pyspark.sql.DataFrameNaFunctions# class pyspark.sql.DataFrameNaFunctions(df)[source]# Functionality for working with missing data in DataFrame. Added in version 1.4.0. Changed in version 3.4.0: Supports Spark Connect. Methods drop([how, thresh, subset]) Returns a new DataFrame omitting rows with null or NaN values. fill(value[, subset]) Returns a new DataFrame which null values are filled with new value. replace(to_replace[, value, subset]) Returns a new DataFrame replacing a value with another value.